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Half-life table of radionuclides

3561
NuclideElementHalf-lifeDecay modes
F-18F1.8295 hbeta+/EC
C-11C20.385 minbeta+/EC
N-13N9.965 minbeta+/EC
O-15O2.0373 minbeta+/EC
Ga-67Ga3.2617 dbeta+/EC
Ga-68Ga1.1285 hbeta+/EC
Ge-68Ge270.95 dbeta+/EC
Tc-99mTc6.0067 hbeta-, IT
Mo-99Mo2.749 dbeta-
I-123I13.223 hbeta+/EC
I-124I4.176 dbeta+/EC
I-125I59.4 dbeta+/EC
I-131I8.0252 dbeta-
In-111In2.8047 dbeta+/EC
Lu-177Lu6.647 dbeta-
Y-90Y2.6667 dbeta-
Sr-89Sr50.53 dbeta-
Ac-225Ac10 dalpha
Ra-223Ra11.43 dalpha
Pb-212Pb10.64 hbeta-
Bi-213Bi45.59 minalpha, beta-
At-211At7.214 halpha, beta+/EC
Ir-192Ir73.827 dbeta-, beta+/EC
Se-75Se119.79 dbeta+/EC
Co-60Co5.2711 ybeta-
Yb-169Yb32.018 dbeta+/EC
Cs-137Cs30.08 ybeta-
Tm-170Tm128.6 dbeta-, beta+/EC
Co-57Co271.74 dbeta+/EC
Ba-133Ba10.516 ybeta+/EC
Eu-152Eu13.537 ybeta+/EC, beta-
Eu-154Eu8.601 ybeta-, beta+/EC
Am-241Am432.6 ySF, alpha
Na-22Na2.6027 ybeta+/EC
Mn-54Mn312.05 dbeta+/EC
Zn-65Zn243.93 dbeta+/EC
Cd-109Cd1.2632 ybeta+/EC
Sr-90Sr28.79 ybeta-
H-3H12.32 ybeta-
C-14C5,700 ybeta-
Ni-63Ni101.2 ybeta-
Fe-55Fe2.744 ybeta+/EC
Cf-252Cf2.6449 yalpha, SF
Ra-226Ra1,600 yalpha
Th-228Th1.912 yalpha
H-4H9.9065e-11 psn
H-5H7.9947e-11 psn
H-6H2.8481e-10 psn
H-7H2.3e-11 psn,n
He-5He7.595e-10 psalpha
He-6He806.7 msbeta-
He-7He3.038e-9 psn
He-8He119.1 msbeta-, beta-,n
He-9He7e-9 psn
He-10He1.519e-9 psn
Li-4Li7.5572e-11 psp
Li-5Li3.0687e-10 psalpha
Li-8Li838 msbeta-,alpha
Li-9Li178.3 msbeta-, beta-,n
Li-10Li2e-9 psn
Li-11Li8.59 msbeta-
Li-12Li10 nsn
Be-5Be1 nsp
Be-6Be4.9533e-9 psp,p
Be-7Be53.22 dbeta+/EC
Be-8Be0.000081813 psalpha
Be-10Be1,510,000 ybeta-
Be-11Be13.81 sbeta-, beta-,alpha
Be-12Be21.3 msbeta-
Be-13Be2.7e-9 psn
Be-14Be4.35 msbeta-, beta-,n, beta-,n,n
Be-15Be200 nsn
Be-16Be200 nsn,n
B-6B1 nsp,p
B-7B3.255e-10 psp
B-8B770 msbeta+/EC,alpha
B-9B8.4389e-7 psp
B-12B20.2 msbeta-
B-13B17.36 msbeta-
B-14B12.5 msbeta-
B-15B9.93 msbeta-, beta-,n, beta-,n,n
B-16B190 psn
B-17B5.08 msbeta-, beta-,n, beta-,n,n, beta-,n,n,n, beta-,n,n,n,n
B-18B26 nsn
B-19B2.92 msbeta-,n, beta-, beta-,n,n
C-8C1.9813e-9 psp,p
C-9C126.5 msbeta+/EC,p, beta+/EC,alpha
C-10C19.29 sbeta+/EC
C-15C2.449 sbeta-
C-16C747 msbeta-, beta-,n
C-17C193 msbeta-, beta-,n
C-18C92 msbeta-, beta-,n
C-19C49 msbeta-, beta-,n
C-20C14.5 msbeta-, beta-,n
C-21C30 nsn
C-22C6.2 msbeta-, beta-,n, beta-,n,n
N-10N2e-10 psp
N-11N3.1274e-10 psp
N-12N11 msbeta+/EC
N-16N7.13 sbeta-, beta-,alpha
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Radionuclide half-lives — reference table

What is in the table

The table lists the half-lives of 3561 radionuclides from the ENDF/B-VIII.0 (NNDC) library — from fractions of a second to billions of years. Search by nuclide or element symbol, sort by half-life, and see decay modes. Click a nuclide to open its card with gamma lines, gamma constant and D-value.

Half-life

The half-life T½ is the time for the activity to halve: A(t) = A₀·2^(−t/T½). To compute activity at a date or the required initial activity, use the decay calculator.

Related calculators

Half-Life Table of Radionuclides — 3561 isotopes (ENDF)